What is the cost of "vampire energy"?

I've been curious recently about how much electricity all our devices that stay plugged in all the time and in some sort of standby mode consume, even when we are not actually using them. And what does that translate into in terms of real money?

The real surprise on it is plasma TVs--who knew they were sucking so much energy when "off"? And that game console of yours? It's costing you $25 a year just sitting there, even when you're not using it. Have more than one console? Well, do the math...

The chart does not include all the wall-warts for cell phones, laptops, cameras, and the like that tend to stay plugged into the wall (and consuming some amount of electricity) even when not actually charging their devices. By some estimates these are responsible for 4 percent of all U.S. electricity consumption, equivalent to almost 100 million tons of oil. Hmm, no wonder the U.S. is 5 percent of the world's population but consumes 23 percent of its energy...